Copying camera



Jarl- 4 1927' R. R. RoBERTsoN COPYING CAMERA Filed June 2. '19N 3 Sheets-Sheet 1 @for fra/e 3 Sheets-Sheet 2 R. R. ROBERTSON COPYING CAMERA Filed Jun-e 2, 1925 'h' rl f M@ Jan. 4 1927.

1,612,987 Jan' 4 "1927 R. R. ROBERTSON COPYING CAMERA' Filed June 2. 1923 5 Sheets-Sheet 5 Patented Jan. 4, 1927.

UNITED STATES ROBERT R. ROBERTSON, OF EVANSTON, ILLINOES,

COPYING CAvIERA.

Application filed June 2, 1923.

This invention relates to copying cameras ot the saine general nature as that set forth in application Serial No. :352,2'i3, filed by me on A pril 1&3, 1922, according to which, among other novel features, the distance ot the lens from the copy board, and consequent proportions of reproduction; are indicated by a distance indicator traveling with the camera and actuated by a positive connector attached to the copy board; the distance ot the Vtoca] plane irom the lens is indicated b y another indicator actuated commensuralely with and preferably by the saine means which develops relative movement of the focusing traine from the bed; and both these indicators are calibrated in like terms so that correspondence ot reading upon the tivo will indicate that the adjustment ct Vfocus is appropriate to the distance trom the copy. The present invention has Ytor its object to improve the means for positioning the camera with relation to the copy board and correspondingly changing the focus ot the camera to agree with its position.

According to one feature ol the present invention, p-ositive connection between the distance gauge and the copy board consists oi? a track upon which the carriage which carries camera is mounted to travel, and a cmnzection through which the distan e indicator is revolved .in its movement relatively to the track, the copy board being suitably mounted at the end of this track or upon a traine vforming part of the same; additional features incident thereto consisting in the particular means for establishing driving connection between the distance indicator and the track, two independent rack and pinion driving means for moving the camera carriage upon the track, one or' which may he employed for rough adjustment of the carriage, and the other ot' which serves for fine adjustments and is completely associated with the distance gauge, as, for instance, by mounting a hand wheel upon the shaft olt the distance gauge and having the same 'rack and pinion connection which drives the gauge impart movements to the carriage when the shaft is driven by said hand wheel, said two driving connections torkthe carriage being so located that at least one ol them will be on the fixed end oi the camera and means for properly zeroizing or determining initial adjustment of the indicator with relation to the track in order to justify the readings.

Serial No. 642,887.

develops the focusing movement. Other ieaturcs incident to this part ot the invention reside in the particular constructioi'i ot' the focusing indicator and the means through which it is associated with the 'focusing drive.

Still another feature of the invention consists in so regulating the distance-regulatingl drive to the focusing drive that the two may be manipulated simultaneously and their indicators readily observed during manipulation.

The invention consists in the novel Yfeatures ot construction and arrangements set forth in the following speci'ication and particularly pointed out in the claims, the detailed description being understoodA to relate to the preferred construction selected ior illustration, and the terms oi' the claims being relied upon to define the scope ot the invention.

In the ai companying drawings* Figure l is a side elevation oi" a camera en'ibodying the features Iof the invention.

.F igiiire 2 is a plan view oit the n'icans for developing` the focus.

Figures 8 and 4i are, respectively, a plan view and a vertical section on the line 4*'-9 of Figure 3, showing the construction of the distance indicator; and

Figures 5, 6, and 'i' are, respectively, an inner side elevation, a plan view, and a vertical axial section showing the focusing drive wheel and its related indicator.

titl

l represents a camera of any suitable construction, 2 a carriage upon which it is mounted and which is adapted through means of wheels 3 to traverse a tracl; 4, and 5 represents a copy board in fixed relatii'in to the track 4 and to and from which the camera is adjusted by tl'.. movements or' the carriage 2 upon said track. ln order to impart rough adjustments to the carriage 2 on the track a pinion 6 is caused to engage with a rack 7, and this pinion is adapted to be rotated by hand wheel 8 preferably loca-ted near the rear end et the c rriage acting through the medium ot' bevel gears 9. shaft l0, and universal joint il. Likewise in engagement with the racli T is a pinion 12 l Ht on a` shaft 13 which causes rotation of said sha-tt as the carriage travels upon its track; and this shaft drives the pointer lll ot an indicator which registers the distance ot the lens of the camera from the copy board. In order to adapt the `ack and pinion connection T, 12, and shatt 13 tor use as a tine adjustment ot the camera. carriage upon the track. shaft 13 is provided vith a hand wheel convenient ttor prehension while the operator is in a position et close observation of the indicator l-l, as, tor inst ance. by bendinsij over the indicator while `graspingthe wheel 1G with his two hands; and in order to zcroiI/.e the indicatorl l5 or bring its indicator into Xacti registry with the dstance that it intei'ided to indi fate, means are provided 'for shitting the pointer l-lindi-ipeudentlj.' ot the drivinggear 12, and this means preterably consists of the hand wheel lt) which solices a joint between the shaft 12E and its extension lil with which the wheel is connected by means oi set screws 1T and 1S (see Fig. By loosening the screw 18 the extension 12) with the p )inter l-l can be rotated at will to justiiy the indicator. Preferably, the extension 13 drives the pointer 1t through mains ot' the reducing tear wheels 19 and 20.

ln order to adjust the focusingsection of the 'amera which in the present illustrat'on is the plate holder section 21. a pinion 2 ou sha'it mounted upon said section, is made to engage with a. tixed rt ck .'21 cai'- ried upon the bed ot the camera upon whch said section is adapted to travel. and .said shat't- 23 extends laterallyT to a. point at a convenient distance from the came a where it receives a hand wheel 2G through which the shaft may be rotated in determining` focusing movements. Supporting this end ot' the shaft 3 is ay combined bracket and indicator housiniiv if? (Figs. 5. (S and i) attached to the under-surface ot the 't'ocusinii section. and within the housingA and coaxial vith said shat't arranged a cylindri al disk 28 having` upon its periphery graduations 29 which are moved by the rotation o t the disk relaiV rely to a reading' line 30 carried by the hous'njg. Reading` line 3() is preterably in the torni etl a lJ-shaped wire depending from an adj ustin` plate 31 into close relation to the gradua rions on the disk; and said plate 3l is secured in position by screws passingl Jthrough slots so that the reading line can be properly adjusted for remr/:ingor initial readingY correction.

The disk 28 is not driven directly by the it ll but inoirectly through 'the medium 1 pinion :2 Fixed upon the shatt and an 223 journaled at 3G amL meshiimwith ..""ernal rr rack fiiwhich is carried fhe indicator di 'el renesents a track grip adapted to be reiste? adjusted by hand shaft 3Q tor firmly locking the carriage 2 in any position to which it may he adjusted upon the track 4.

The calibrations on the two indicators 14 and will be ind Xed in the same terms, applied thereto in Isuch manner that whenever the .same reading appears on both indicators. the focusing adjustment. will be appropriate to the distance adjustment, as described and claimed in my previousl application heicnhetore identitied.

The copy board 5 is prefer; bij' maintained through the medium olI a tilting` table 5 pivoted at. 5 upon the uprights 5, an arrestingy stop 5 being); provided to hold it either i ver'cal or "al position; and in o-"dcr to inf-ure the \ertica position. braces iin-ff 5f' are arranged to connect the uprights 5 with the hed i upon which the copy hoidcr mounted.

i c-aiin:

l. ln photographic copying ajiparatus, a carriage adapted to support a camera. a t ack upon which said ari-inge runs, a rack mounted on said track. two pinions mounted on the carria; and enacting with said rack, means 1for driving; one ot said pinions, an miic; tor actuated by the other ot said pinindependent means direct-ly associi" said other pinion t'or manually dri. 'ig' the same and impartmg movement a track. a carriage mounted to travel on said track. a ramera supported on and movin;Y bodily with said carriage and having t'ozusine' movement upon the carriage, means 'tor positively novinp; the camera to 'focus it. and means tor positively driving the :arriag'e upon its track to determine the loc-tion i as a whole: said camere and ot the came is' provided with indicators ada id to r-:hmv movements imparted to them. respectively the indicator indicating t i ck comprisni;- a shan in i en in the movements orn the carriage and a pointer driven )y said shaft; said shaft being divided having' one ot' its portions in driving relation to :aid pointer and having means tor imparting` independent movement thereto tor correcting the pointer.

i-iened at Chicago, lll.. dav. i923.

this 29th day of 

